article: This is Kim and Kate's bedroom. The blue bed is Kate's and the green one is Kim's. They are sisters. Kate's schoolbag is red. It's on the bed. Kim's schoolbag is yellow. It's on the chair. They have a computer. It's on the table. Their alarm clock is on the table, too. There is a baseball under their table. It's Lily's. Lily is Kim and Kate's good friend.
question: Kim and Kate are   _  .
options: friends brothers sisters cousins